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Acids, Bases and Salts

1. Which is changes the blue litmus to red?                                                                                 
     A) Acids      B) Bases      C) Salts      D) Neutral substances


2. Which is changes the red litmus to blue?                                                                                 
     A) Acids      B) Bases      C) Salts      D) Neutral substances


3. The substance which give H+ ions in aqueous solution is called                                           
     A) Acid      B) Base     C) Salt      D) Neutral substances


4. The substance which gives OH- ions in aqueous solution is called                                       

5. If water molecules observes H+ ions then it forms                                                               
     A) OH    B) H3O+      C) H2O+      D) H2O


6. The substance which gives excess of H ions in aqueous solution is called                        
     A) Strong acid      B) Weak acid     C) Strong base      D) Weak base


7. The substance which gives less number of H+ ions in aqueous solution is called              
     A) Strong acid      B) Weak acid     C) Strong base      D) Weak base


8. The substance which gives excess of OH- ions in aqueous solution is called                      
     A) Strong acid      B) Weak acid      C) Strong base      D) Weak base


9. The substance which gives less number of OH- ions in aqueous solution is called               
     A) Strong acid      B) Weak acid      C) Strong base      D) Weak base


10. Which of the following is strong acid?                                                                                     
     A) HNO3      B) H2SO4      C) HCl      D) HClO4


11. Which of the following is strong base?                                                                                   
     A) LiOH      B) NaOH      C) KOH      D) NH4OH


12. Which of the following is a weak base?                                                                                   
     A) NH4OH      B) NaOH      C) KOH      D) LiOH


13. Which of the following is a weak acid?                                                                                    
     A) H2SO3      B) H2SO4      C) HCl      D) CH3COOH


14. The pH scale was introduced by                                                                                           
     A) Charles      B) Sorenson      C) Bohr      D) Arrhenius


15. If the pH of a solution is 0, it is                                                                                               
     A) Strong acid      B) Weak acid      C) Strong base      D) Weak base


16. The pH of pure water is                                                                                                          
     A) 5      B) 0      C) 9      D) 7


17. If the pH of a solution is 13.8. Then it is                                                                             
     A) Strong base      B) Strong acid      C) Weak base      D) Weak acid


18. Mention the formula of gas evolved when Na2CO3 reacts with HCl acid                      
     A) CO2      B) H2O      C) N2      D) H2

19. Match the following:

A) 1-a, 2-c, 3-d, 4-b    B) 1-d, 2-b, 3-a, 4-c   C) 1-b, 2-d, 3-a, 4-c   D) 1-b, 2-a, 3-d, 4-c

20. Acids reacts with bases to produce a ..... and water.                                                          
     A) Salts      B) Bleaching powder     C) Washing soda      D) Baking soda    

21. Aqueous basic solutions conduct electricity because they have                                      
     A) H+ ions      B) OH- ions     C) both H+ and OH- ions      D) H3O+ ions

22. Sodium hydroxide is called                                                                                                    
     A) Caustic Soda      B) Soda lime     C) Chile Salt Petre      D) Caustic Potash

23. The gas obtained at the anode in the electrolysis of Brine is                                          
     A) CO2      B) Cl2      C) O2      D) H2

24. The gas obtained at the cathode in the chlor-alkali process is                                        
     A) CO2      B) Cl2      C) O2      D) H2

25. Which of the following is not an use of Sodium hydroxide?                                             
     A) Preparation of CFC           B) Preparation of Soaps     
     C) Paper making                     D) Preparation of artificial fibers

26. Which of the following is not an use of Bleaching powder?                                                
     A) Antiseptic      B) Bleaching of wood pulp     C) disinfecting      D) oxidizing agent

27. The use of Chlorine is                                                                                                              
     A) Water treatment      B) CFC     C) Pesticides      D) All the above

28. In which of the following Hydrogen is not useful                                                               
     A) Pesticides      B) Fuels     C) Margarine      D) Ammonia

29. The use of Hydrochloric acid is in                                                                                          
     A) water treatment      B) preparation of soaps     C) cleaning steel      D) pesticides

30. In which of the following NaHCO3 is not useful                                                                 
     A) Antiseptic                                             B) Soda-acid     
     C) Preparation of Baking powder           D) Preparation of glass

31. In which of the following Sodium carbonate is not used                                                     
     A) to remove permanent hardness of water        B) Domestic purpose
     C) Fuels                                                                      D) Paper Industries

32. Dry slaked lime is treated with Chlorine gas, the obtained product is                             
     A) Washing Soda      B) Baking powder     C) Bleaching powder      D) Common salt

33. Baking Soda is                                                                                                                          
     A) NaHCO3. 10 H2O      B) NaHCO3     C) Na2CO3      D) NaCO3

34. On heating baking soda, the obtained gas is                                                                       
     A) O2      B) H2      C) CO2      D) N2

35. Sodium bicarbonate is used as                                                                                             
     A) antacid      B) preparation of glass     C) washing powder      D) water treatment

36. Baking powder is the mixture of                                                                                         
       i) Sodium Hydrogen Carbonate       ii) Sodium Carbonate
       iii) Oxalic acid                                    iv) Calcium di hydrogen phosphate
       A) i and iii           B) ii and iv           C) i and iv           D) iii and i

37. The substance used in the removing of permanent hardness of water is                    
     A) NaHCO3      B) Na2CO3     C) NaHSO4      D) Na2SO4

38. The colour of anhydrous Copper sulphate is                                                                     
     A) Blue      B) White      C) Green      D) None

39. The formula of Gypsum is                                                                                                   
     A) CaSO4                     B) CaSO4.  H2O
     C) CaSO4. 2 H2O         D) CaSO4 H2O

40. Calcium sulphate hemihydrate is known as                                                                      
     A) Gypsum          B) Plaster of paris
     C) Anhydrate      D) Bleaching powder

41. Plaster of paris becomes hard by                                                                                       
     A) reaction with CO2      B) Liberating CO2     C) Losing water          D) adding water

42. The substance used in the bandage of fractured bones is                                              
     A) Gypsum      B) Bleaching powder     C) Plaster of paris      D) Calcium Sulphate

43. The substance used to the preparation of statues and black board chalks is             
     A) Plaster of paris      B) limestone     C) Bleaching powder      D) Calcium sulphate

44. If we add few drops of universal indicator to dilute Hydrochloric acid, then the colour of the solution is                                                                                                                              
     A) Red           B) Yellow           C) Violet           D) Green

45. The components of baking powder are                                                                              
     A) Na2CO3, NaHCO3              B) NaHCO3, NaOH
     C) Na2CO3, Ca(H2PO4)2       D) NaHCO3, Ca(H2PO4)and Starch

46. The pH value of a salt formed by a reaction of Strong acid and Weak base is                
     A) 0           B) 7             C) Less than 7            D) More than 7

47. Solid Sodium bicarbonate was placed on a strip of pH paper, the colour of the strip is 
     A) turned blue      B) did not change     C) turned green      D) turned light pink

48. Which solution contains pH value between 8 - 14?                                                            
     A) Acids      B) Bases      C) Neutral      D) None of these

49. Stinging of Honey Bee causes pain due to releasing of                                                        
     A) Methanoic Acid      B) Tartaric Acid     C) Hydrochloric Acid      D) Citric Acid

50. Which of the following pair is incorrect?                                                                              
     A) NaOH  Na+ + OH-                     B) KOH  K+ + OH- 
     C) Ca(OH)2  Ca+2 + 2 OH-           D) Zn(OH)2  Zn+2 + OH-2

51. Which of the following matching is incorrect?                                                                      
 A) Lemon Juice - Acid   B) Vinegar - Acid   C) Baking Soda - Base   D) Rain Water - Neutral

52. Select the correct statement of the following.                                                                      
     A) Litmus solution is a dye extracted from Lichen     
     B) In neutral solution litmus colour is Purple
     C) Acids turns blue litmus to red
     D) All the above

53. Arrange the following in the increasing order of their pH value.                                    
     a) Gastric fluid      b) Milk of magnesia     c) Blood      d) Lemon Juice
     A) a, b, c, d           B) a, c, b, d           C) a, d, b, c           D) a, d, c, b

54. Arrange the following in the decreasing order of their pH value.                                     
     a) Orange juice      b) Sea Water      c) Lemon juice      d) Blood
     A) a, b, c, d           B) b, c, d, a           C) b, d, c, a           D) b, d, a, c

55. H2SO4 reacts with a salt of 'X' and produces the reactants 'Y' and Na2SO4. So, what are 'X' and 'Y'?                                                                                                                                         
     A) Cl, HC     B) HCl, NaC     C) NaCl, HC     D) NaCl, H2

56. On mixing with water Plaster of paris forms                                                                    
     A) Ca(OH)2      B) CaSO4. 7 H2O     C) CaSO4. 2 H2O      D) CaSO4.  H2O

57. Which of the following pair is incorrect?                                                                         
     A) Blood pH = 7.4                     B) Sea Water pH = 8     
     C) Lemon Juice pH = 6.4        D) Orange Juice pH = 3.4

58. Which is used as soda acid in fire extinguishers?                                                                
     A) Na2CO3      B) NaOH      C) NaHCO3      D) NaCl

59. Which of the following is used as mild antiseptic?                                                          
     A) Na2CO3      B) NaHCO3      C) NaOH      D) NaCl

60. When acid rain flows into the rivers, then the pH of water                                            
     A) Increases      B) Decreases      C) No change      D) Can not say

61. When the pH of the mouth is lower than 5.5 then which of the following may causes?    
     A) Tooth decay      B) Guiter      C) Beri Beri      D) Malaria

62. On dissolving acid or base in water, heat                                                                            
     A) receives      B) produces     C) No change      D) Depending on situation

63. On adding water to acid, ions concentration will be                                                          
     A) Increases      B) decreases      C) No change      D) can not say

64. To diluting an acid, the acid should be added to water in the following manner           
     A) Total acid should be added at a time
     B) 50% acid should be added first, then remaining 50% acid added next
     C) 25% acid should be added first, then remaining 75% acid added next
     D) Acid should be added dropwise

65. Which of the following produced the neutralized reaction?                                         
     A) Salts      B) Acids      C) Water      D) Both A and C

66. pH of the salt formed by a strong acid and strong base is                                       
     A) < 7      B) > 7      C) 7      D)  7

67. The pH of value of a salt formed by a strong base acid and weak base is                    
     A) < 7      B) > 7      C) 7      D)  7

68. The pH of value of a salt formed by a weak acid and strong base is                             
     A) < 7      B) > 7      C) 7      D)  7

69. The pH value of lemon juice is                                                                                            
     A) 2.1      B) 2.2      C) 2.3      D) 2.4

70. The pH value of a human blood is                                                                                    
     A) 7      B) 7.1      C) 7.2      D) 7.3

71. The pH value of freshly distilled water is                                                                         
     A) 6.5      B) 7      C) 7.5      D) 8

72. The pH value of coffee is                                                                                                    
     A) 4      B) 4.5 - 5      C) 6      D) 7

73. The reason for pain and irritation in the stomach of a human is                                 
     A) Excess acids released in the stomach     B) Excess bases released in the stomach
     C) Less acids released in the stomach          D) Less bases released in the stomach

74. Our stomach produces an acid is                                                                                       

     A) HC     B) H2CO3      C) H2SO4      D) HNO3

75. Antacids are                                                                                                                         
     A) Acids      B) Bases      C) Salts      D) Neutrals

76. Antacids ..... excess acids produced in the stomach.                                                     
     A) Increases      B) Decreases     C) Neutralise      D) None of these

77. Bee sting leaves an acid is called                                                                                       
     A) Formic acid      B) Methanoic acid     C) Hydrochloric acid      D) Acetic acid

78. The chemical which is used to relief on the sting area of honey bee is                         
     A) Washing soda      B) Sodium phosphate     C) Sodium chloride      D) Baking soda    

79. During indigestion, the following shall not be used                                                        
     A) Milk of Magnesia      B) ENO     C) Baking soda      D) Lemon juice

80. Which of the following chemical pairs gives common salt?                                           
     A) Zinc, Hydrochloric acid                    B) Nitrogen, Chlorine
     C) Nitric acid, Sodium carbonate         D) Sodium sulphate, Barium chloride


81. Which of the following is weak base?
A) KOH        B) NaOH         C) NH4OH     D) None


82. Which of the following has larger number of H3O+ ions of solution?
A) HCl solution
B) CH3COOH solution
C) NaOH solution
D) Mg(OH)2 solution


83. Which of the following salt contains pH value more than 7?
B) NH4Cl
C) NaCl

84. (a) Caustic Soda (i) NaHCO3
(b) Baking Soda (ii) CaSO4 . 2 H2O
(c) Gypsum (iii) CaSO4 . 1/2 H2O
(d) Plaster of Paris (iv) NaOH

A) a-i; b-ii; c-iii; d-iv
B) a-i; b-iv; c-iii; d-ii
C) a-iv; b-i; c-iii; d-ii
D) a-iv; b-i; c-ii; d-iii

85. HCl + H2 X + C̅. In this equation X is
A) H3O+
B) OH̅
D) H2O+


86. Chemical formula of Bleaching powder -
A) CaOCl2
B) CaOCl
C) CaOCl3
D) CaOCl4


87. Which of the following compound has least pH value?
A) Sugar
B) Tomato juice
C) Vinegar
D) Washing soda


88. The salts of strong acid and weak base are acidic and the pH value is
A) = 7
B) < 7
C) > 7
D) All


89. Chemical formula of hydrated copper sulphate -
A) CuSO4
B) CuSO4. 2 H2O
C) CuSO4. 4 H2O
D) CuSO4. 5 H2O


90. Common name of milk of magnesia is.....
A) Magnesium oxide
B) Magnesium chloride
C) Magnesium hydroxide
D) Magnesium sulphate


91. Which of the following has pH greater than 7?
A) Coffee
B) Vinegar
C) Blood
D) Gastric juice


92. Zn + X  ZnCl2 + H2. In this reaction, X represents ..........
A) Acid
B) Base
C) Salt
D) None of these


93. Tooth decay occurs when pH is ...........
A) 7
B) 5.5
C) > 5.5
D) < 5.5


94. Hemi Hydrate means ...........
A) 2 H2O
B) 1/2 H2O
C) H2O
D) 10 H2O


95. Antacids are made with ...........
A) Strong acid
B) Strong base
C) Weak acid
D) Weak base


Answers: 1-A;   2-B;   3-A;   4-B;   5-B;   6-A;   7-B;   8-C;   9-D;   10-C;   11-B;   12-A;   13-D;   14-B;   15-A;   16-D;   17-A;   18-A;   19-C;  20-A; 21-B;   22-A;   23-B;   24-D;   25-A;   26-A;  27-D;   28-A;   29-C;   30-D;   31-C;   32-C; 33-B;   34-C;   35-A;   36-C;   37-B;   38-A;  39-C;   40-B;   41-D;    42-C;    43-A;  44-A;   45-D;   46-C;   47-B;   48-B;   49-A;   50-D; 51-D;   52-D;   53-D;   54-D; 55-C; 56-C; 57-C; 58-C; 59-B; 60-B; 61-A;   62-B;   63-B;   64-D;   65-D;   66-C;  67-D;   68-B;   69-A;   70-C;   71-B;   72-B;   73-A;  74-A;   75-B;   76-C;   77-B;   78-D;   79-D;   80-D; 81-C;   82-A;   83-D;   84-D;   85-A;   86-A;   87-C;   88-B;   89-D;   90-C;   91-C;   92-A;  93-D;   94-B;  95-D;

Posted Date : 26-06-2021


గమనిక : ప్రతిభ.ఈనాడు.నెట్‌లో కనిపించే వ్యాపార ప్రకటనలు వివిధ దేశాల్లోని వ్యాపారులు, సంస్థల నుంచి వస్తాయి. మరి కొన్ని ప్రకటనలు పాఠకుల అభిరుచి మేరకు కృత్రిమ మేధస్సు సాంకేతికత సాయంతో ప్రదర్శితమవుతుంటాయి. ఆ ప్రకటనల్లోని ఉత్పత్తులను లేదా సేవలను పాఠకులు స్వయంగా విచారించుకొని, జాగ్రత్తగా పరిశీలించి కొనుక్కోవాలి లేదా వినియోగించుకోవాలి. వాటి నాణ్యత లేదా లోపాలతో ఈనాడు యాజమాన్యానికి ఎలాంటి సంబంధం లేదు. ఈ విషయంలో ఉత్తర ప్రత్యుత్తరాలకు, ఈ-మెయిల్స్ కి, ఇంకా ఇతర రూపాల్లో సమాచార మార్పిడికి తావు లేదు. ఫిర్యాదులు స్వీకరించడం కుదరదు. పాఠకులు గమనించి, సహకరించాలని మనవి.